system-dpdk: Ignore net/ice error log about QinQ offloading.

The net/ice DPDK driver complains with an ERROR level log message if the
hw firmware only supports SVM (Single Vlan Mode).
DVM (Dual Vlan mode) seems required when using QinQ offloading.
OVS does not care about this offloading feature and configures nothing
on that topic.

While seeing this error log, some manual tests show that
untagged/tagged/"double" tagged packets (with 0x8100 ethertype)
are still received/transmitted fine.

Ignore this log waiting for a fix on the DPDK side.

Link: https://bugs.dpdk.org/show_bug.cgi?id=1331
Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Eelco Chaudron <echaudro@redhat.com>
Acked-by: Kevin Traynor <ktraynor@redhat.com>
Signed-off-by: Kevin Traynor <ktraynor@redhat.com>

tests/system-dpdk-macros.at

@@ -86,6 +86,7 @@ $1";/does not exist. The Open vSwitch kernel module is probably not loaded./d
 /does not support MTU configuration,/d
 /EAL: No \(available\|free\) .*hugepages reported/d
 /Failed to enable flow control/d
+/ice_vsi_config_outer_vlan_stripping(): Single VLAN mode (SVM) does not support qinq/d
 /Rx checksum offload is not supported on/d
 /TELEMETRY: No legacy callbacks, legacy socket not created/d"])
 ])